JP2014235824A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device capable of suppressing illuminance irregularity even though having a light-emitting element module of high output.SOLUTION: An illumination device includes a light-emitting element module 31 having a light-emitting part 35 in which a plurality of light emitters are arranged on a substrate, and a pair of opposite reflection surfaces 51, 52 facing each other with the light-emitting element module 31 interposed therebetween. At least one of the opposite reflection surfaces 51, 52 includes convex reflection surface parts 57, 58 which distributes light outgoing downward from the light-emitting element module 31 between open sections 50A in both sides of the opposite reflection surfaces 51, 52.

Description

  The present invention relates to a lighting fixture provided with a light emitting element as a light source.

  In the road lighting fixtures, fixtures using LEDs as light sources have been developed along with the higher brightness of LEDs. A light source of this type of road lighting apparatus is generally configured by arranging a plurality of LEDs on a substrate (for example, see Patent Document 1). This LED is a device that is individually handled as one circuit component and can control light emission independently of each other, and a chip-type LED or the like in which an LED element is arranged in a reflecting surface is preferably used.

JP 2011-187304 A

However, in the conventional configuration described above, the amount of light traveling directly below the reflective surface alone increases, resulting in uneven illuminance. Although it is conceivable to distribute light with a resin lens such as acrylic, when a high-output light-emitting element module is used as a light source in an application where a larger amount of light is required, the light-emitting element module generates a large amount of heat. Since the temperature becomes high, problems such as deformation of the lens material and changes in physical properties are likely to occur. Therefore, it is not possible to use a general-purpose resin lens having a relatively low heat resistant temperature such as acrylic. When a large amount of light is realized by providing a large number of light emitting elements and lenses instead of the high output light emitting element module, the number of parts and the cost increase.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the lighting fixture which can suppress illumination intensity nonuniformity even when it is a case where a high output light emitting element module is used.

  In order to achieve the above-described object, the present invention provides a light emitting element module in which a plurality of light emitting elements are arranged on a substrate to form a light emitting portion, a pair of facing reflection surfaces facing each other with the light emitting element module interposed therebetween, And at least one of the facing reflecting surfaces is provided with a convex reflecting surface portion that distributes light directed directly from the light emitting element module toward open portions on both sides of the pair of facing reflecting surfaces. .

  In the above configuration, the shape of the facing reflection surface extending from the light emitting element module side to the irradiation side may be a shape that approximates a parabolic shape.

  In the above-described configuration, the facing reflection surface may be formed in a shape in which a plurality of planes approximating the parabolic shape are connected from the light emitting element module side to the irradiation side.

  In the configuration described above, the reflection surface portion may be provided on a pair of the reflection surfaces so as to face each other in the vicinity of the optical axis of the light emitting element module.

  In the above-described configuration, an auxiliary reflecting surface that closes the open portions on both sides of the pair of facing reflecting surfaces is provided, and the auxiliary reflecting surfaces are arranged so as to reflect the light of the light emitting element module toward the irradiation range. Also good.

  In the above-described configuration, the auxiliary reflecting surface may have a shape in which a plurality of planes are connected from one facing reflecting surface to the other facing reflecting surface.

  In the above-described configuration, the facing reflection surface may include a widened portion that extends from the parabolic shape to the outside of the light emitting portion of the light emitting element module on the light emitting element module side.

  In the above-described configuration, a diffusion surface portion that diffuses and reflects light of the light emitting element module may be provided in the widened portion.

  In the above-described configuration, a bottom surface reflecting surface that connects the light emitting element module side of the pair of facing surface reflecting surfaces may be provided.

  In the above-described configuration, the irradiation-side edge of the reflecting surface may determine an angle at which the light-emitting element module is directly irradiated outside the instrument.

  In the above-described configuration, the convex reflection surface portion may be formed of a polygon, a curved surface, or a combination thereof.

  In the above-described configuration, a plurality of bosses may be provided on the bottom reflecting surface.

  In the above-described configuration, an insulating sheet may be disposed between the light emitting element module and the reflecting surface, and a pair of claw portions that hold the insulating sheet may be provided on the reflecting surface.

  According to the present invention, it is possible to distribute light traveling directly below to the open portions on both sides of the pair of face-to-face reflection surfaces, so that unevenness in illuminance can be suppressed.

It is a figure which shows the tunnel lighting fixture which concerns on embodiment of this invention, (A) is a front view, (B) is a side view, (C) is a bottom view. It is a figure which shows the installation state of a tunnel lighting fixture. It is a perspective view which shows a light source unit. It is a disassembled perspective view which shows a light source unit. It is VV sectional drawing of FIG. It is VI-VI sectional drawing of FIG. It is a figure which shows a reflector, (A) is a front view, (B) is a top view, (C) is a bottom view, (D) is a rear view, (E) is a left side view, (F) is a right side view. FIG. It is a figure which expands and shows the VIII-VIII cross section of FIG. It is explanatory drawing which shows the structure of a left side reflective surface and a right side reflective surface. It is a figure which shows the reflector which concerns on the modification of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a tunnel lighting fixture is illustrated as an example of a road lighting fixture.
FIG. 1 is a diagram showing a tunnel lighting apparatus 1 according to the present embodiment, in which FIG. 1 (A) is a front view, FIG. 1 (B) is a side view, and FIG. 1 (C) is a bottom view. FIG. 2 is a diagram illustrating an installation state of the tunnel lighting fixture 1. In the present specification, as shown in FIG. 1 (A), the direction facing vertically toward the front of the page is the front direction, the upper side and the lower side are the upper direction, the lower direction, the left side of the page, and The right side is defined as the left direction and the right direction.

Prior to the description of the configuration of the tunnel lighting device 1, the installation state of the tunnel lighting device 1 will be described. As shown in FIG. 2, the tunnel lighting device 1 is installed at the entrance of the tunnel 80 on the wall surface or ceiling surface (the ceiling surface in the present embodiment) of the tunnel 80 where the road 81 extends. The road 81 has a road surface 82 defined by two roadway outer lines 82A and 82B extending in parallel. In the present embodiment, the tunnel lighting fixture 1 has the lamp optical axis G on the far side (at the position where it enters the road surface 82 by the width W1 from the nearest roadway 82A on the nearest side (near side) or retreats outside the road surface 82. It is installed on the ceiling surface of the tunnel 80 so as to be positioned on the near side or the far side by a width W2 from the roadway outer line 82B on the opposite side of the near side.
In the present specification, a direction in which the road 81 extends (a direction in which the vehicle travels) is defined as a longitudinal direction J, and a direction orthogonal to the longitudinal direction J is defined as a transverse direction M.

Next, the configuration of the tunnel lighting device 1 will be described.
As shown in FIG. 1, the tunnel lighting device 1 includes a device case 2 having an open front. The instrument case 2 is made of a material such as metal having excellent corrosion resistance and thermal conductivity, and is formed in a rectangular box shape that is long in the left-right direction. The front opening (opening) 7 has a flat front glass ( (Lid body) 3 is fitted. The front glass 3 is connected to the upper side 1A of the instrument case 2 by a pair of hinges 4 so as to be freely opened and closed, and is fastened to the lower side 1B of the instrument case 2 by a pair of latches 5. The front opening 7 of the instrument case 2 is provided with a packing 9 as a seal member for sealing between the front glass 3 along an opening edge configured as a stepped portion. A metal fitting 6 for installing the instrument case 2 in the tunnel 80 (FIG. 2) is attached to the back surface (bottom surface) of the instrument case 2. A heat sink 21 is provided on the back surface (bottom surface) 2 </ b> B of the instrument case 2.
In this tunnel lighting device 1, the front glass 3 faces the road surface 82 (FIG. 2) of the road 81, and the left-right direction I that is the direction connecting the left side surface 1 </ b> C and the right side surface 1 </ b> D is aligned with the longitudinal direction J of the road 81. In the posture, it is installed in the tunnel 80.

In the instrument case 2, a light source unit 10, a power supply terminal block 11, and a power supply box 12 are housed.
The light source unit 10 uses an LED as an example of a light emitting element as a light source, and details thereof will be described later. The power terminal block 11 connects the wiring drawn in from the outside of the instrument case 2 and the wiring of the power supply box 12. The power supply box 12 generates DC power for driving the light source unit 10, and includes an AC-DC converter, converts commercial AC power supplied from the outside into DC power, and supplies the DC power to the light source unit 10. . Note that the power supply box 12 may vary the amount of light of the light source unit 10 by varying the DC power (for example, DC current) based on a dimming instruction from the outside. In addition, the appliance case 2 may incorporate a battery as an emergency power used in the event of a power failure. Electronic components such as the power supply terminal block 11 and the power supply box 12 are arranged below the light source unit 10.

The light source unit 10 includes a plurality of light source units 30 and a mounting plate 40 to which the light source units 30 are attached. The mounting plate 40 is fixed to the heat sink 21 via a mounting base (not shown), and is formed in a rectangular plate shape that is long in the left-right direction when viewed from the front. The heat sink 21, the mounting plate 40, and the mounting base are formed of a material such as aluminum having excellent thermal conductivity, and constitute a heat radiating member.
Further, the light source unit 30 is disposed in the vicinity of the front glass 3 (in the vicinity of the front opening 7), and the light of the light source unit 30 is efficiently extracted while suppressing the shielding by the inner wall 2C (see FIG. 8) of the instrument case 2. It is.

FIG. 3 is a perspective view showing the light source unit 30, and FIG. 4 is an exploded perspective view showing the light source unit 30.
As shown in FIGS. 3 and 4, the light source unit 30 includes a light emitting element module 31 mounted on the substrate 34, a reflector 32 surrounding the light emitting element module 31, and an insulating sheet 38, which are stacked in this order. It is assembled and configured like this.
The light emitting element module 31 is an LED module having a chip-on-board (COB) structure in which a large number of LEDs are densely arranged on a substrate 34 to form a light emitting portion 35 having a substantially circular shape (which may be a quadrangle). . The planar light emitting unit 35 has an optical axis F in a direction substantially perpendicular to the surface, and is housed in the instrument case 2 in a posture in which the optical axis F is oriented in the front direction. The luminous intensity distribution of the light emitting element module 31 of the present embodiment spreads in a shape that is almost similar to a completely diffusing surface light source.

In general, an LED module having a chip-on-board structure has a large luminance and a high luminance and a large light output because a large number of LEDs are densely arranged.
Therefore, when the light source unit 30 includes the light emitting element module 31 in the light source, a light source unit with a large amount of light can be obtained.
In this embodiment, as shown in FIG.1 and FIG.4, the light source part 10 is provided with the eight light emitting element modules 31, and the increase in the further light quantity is aimed at. Specifically, two light emitting element modules 31 are vertically mounted on both upper and lower sides of a rectangular plate-like wiring board 36 to form a light emitting element module unit 37, and the four light emitting element module units 37 are mounted side by side. It is arranged on the surface of the plate 40. The wiring board 36 is made of a material, such as a ceramic material, which can obtain the electric withstand voltage of the light emitting element module 31 and the mounting plate 40 and has heat dissipation. You may change the number of the light emitting element modules 31 mounted in one light emitting element module unit 37 according to the light quantity requested | required of the tunnel lighting fixture 1. FIG. On each light emitting element module unit 37, an insulating sheet 38 having an exposed opening 38A that exposes the light emitting element module 31 is provided, and the insulating sheet 38 is fixed to the mounting plate 40 by a fixing spring (fixing member) 39. .

The reflector 32 distributes the light of the light emitting element module 31, and the reflector 32 provides a horizontally elongated light distribution extending in the left and right directions in the light source unit 30.
The light source unit 10 includes a plurality of light source units 30 as described above. The light source units 30 have the same light distribution as each other, and illuminate substantially the same irradiation area of the road surface 82 (FIG. 2). Luminance and wall luminance are enhanced.

Next, the reflector 32 of this embodiment will be described in detail.
5 is a VV cross-sectional view of FIG. 3, and FIG. 6 is a VI-VI cross-sectional view of FIG. 7A and 7B are diagrams showing the reflector 32. FIG. 7A is a front view, FIG. 7B is a plan view, FIG. 7C is a bottom view, and FIG. 7D is a rear view. 7 (E) is a left side view, and FIG. 7 (F) is a right side view. FIG. 8 is an enlarged view showing a section VIII-VIII in FIG.
As shown in FIG. 3, the reflector 32 has a substantially rectangular box shape with a front opening, and includes a reflecting surface 50 that distributes the light of the light emitting element module 31. The reflecting surface 50 includes an upper side reflecting surface 51 that is the upper side of the reflector 32, a lower side reflecting surface 52 that is a lower side, a left side reflecting surface 53 that is a left side, a right side reflecting surface 54 that is a right side, and a bottom surface. The bottom bottom reflecting surface 55 is provided. The upper side reflection surface 51 and the lower side reflection surface 52 face each other with the light emitting element module 31 interposed therebetween, and the left side reflection surface 53 and the right side reflection surface 54 are opposite to the upper side reflection surface 51 and the lower side reflection surface 52 facing each other. An auxiliary reflecting surface that closes the open portion 50A is configured.

  For example, the reflective surface 50 has an increased reflectance by depositing an aluminum reflective film or the like on the surface of the reflector 32 formed of a resin such as a PC (polycarbonate) resin having a relatively high heat resistance among the resins. Yes. The reflector 32 may be a metal such as aluminum. The reflector 32 is disposed so that the bottom surface of the reflector 32 faces the light emitting element module 31, and the light emitting unit 35 is exposed to a position corresponding to the light emitting unit 35 on the bottom surface of the reflector 32. An opening 33A is formed. As shown in FIGS. 5 and 6, the reflector 32 is spaced apart from the light emitting unit 35 by a predetermined distance D in the direction of the optical axis F so that the heat of the light emitting unit 35 can be efficiently released. .

  The reflector 32 has a plurality of fixing portions 32 </ b> A, and these fixing portions 32 </ b> A are fixed by being screwed to the mounting plate 40. In the present embodiment, a pair of left and right fixing portions 32A is provided. One (left in this embodiment) fixing portion 32A has a round hole 32A1, and the other (right in this embodiment) fixing portion 32A. A U-shaped groove 32A2 is formed. By making the one fixed portion 32A into the round hole 32A1, it can be hooked on the hook in the vapor deposition step of the reflection surface 50, and a dedicated vapor deposition jig for the reflection surface 50 is not required. Note that the number and arrangement position of the fixing portions 32A are not limited to this.

  The reflector 32 is fixed so that a line P (FIG. 9) perpendicular to the optical axis F and extending to the left and right of the reflector 32 is substantially parallel to the left-right direction (longitudinal direction J). On the back surface of the reflector 32, as shown in FIG. 7D, a defining member 32B for positioning and orientation of the reflector 32 is formed. In the present embodiment, the defining member 32B is formed on the back surface of the fixed portion 32A, but the position of the defining member 32B is not limited to this.

  Further, on the back surface of the reflector 32, claw portions 32C extending toward the mounting plate 40 are provided on the upper and lower side surfaces of the longitudinal direction. Since the claw portion 32C can suppress the floating of the insulating sheet 38, it is possible to prevent so-called vignetting in which a part of a wide area component emitted from the end of the light emitting portion 35 is blocked by the insulating sheet 38. The claw portions 32C may be provided on the short left side surface and the right side surface, for example. However, if the claw portions 32C are provided in the longitudinal direction, the insulating sheet 38 can be pressed in the vicinity of the light emitting unit 35. It can be prevented more effectively.

As shown in FIGS. 7E and 7F, the upper side reflection surface 51 and the lower side reflection surface 52 have a parabolic shape extending from the base portion 50B on the light emitting element module 31 side to the edge portion 50C on the irradiation side. It is formed in an approximate shape. Thereby, the reflected light of the upper side reflective surface 51 and the lower side reflective surface 52 becomes substantially parallel light. Therefore, the edge part 50C of the upper side reflection surface 51 and the lower side reflection surface 52 determines the angle directly irradiated from the light emitting element module 31 to the outside of the tunnel lighting fixture 1, and as a result, irradiation on the road surface 82 (FIG. 2). The width of the range in the transverse direction M will be determined.
In this embodiment, since the irradiation range and the light distribution shape viewed from the light emitting element module 31 are not symmetrical in the vertical direction (transverse direction M), the upper side reflection surface 51 and the lower side reflection surface 52 have different parabolic shapes. Is formed.

Here, if the upper side reflection surface 51 and the lower side reflection surface 52 remain in a perfect parabolic shape, the light collecting property is strong, and unevenness in illuminance is likely to occur on the road surface 82 (FIG. 2).
Therefore, in the present embodiment, the upper side reflection surface 51 and the lower side reflection surface 52 have a plurality of facets (planes) 51A-51E and 52A-52E, as shown in FIG. Are connected to the edge portion 50C from the base portion 50B. Thereby, since the light of the light emitting element module 31 can be disperse | distributed and reflected, illuminance nonuniformity can be suppressed.

In the present embodiment, since the light emitting portion 35 has a planar shape, when the entire upper side reflective surface 51 and lower side reflective surface 52 are formed in a parabolic shape, an opening 33 that exposes the relatively large light emitting portion 35 is formed. Therefore, the reflector 32 as a whole becomes large.
Accordingly, the paraboloids of the upper side reflection surface 51 and the lower side reflection surface 52 are formed to be relatively small, and the facets 51E and 52E on the side of the base 50B are formed outside the light emitting unit 35 to form a widened portion. doing. Accordingly, the reflector 32 can be reduced in size by reducing the vertical height of the reflector 32 without reducing the size of the light emitting unit 35.

  In the present embodiment, the facet 51E on the base 50B side of the upper side reflection surface 51 has a relatively large inclination angle from the basic parabolic shape and a relatively large area. For this reason, the reflection component by the facet 51E contributes to the peak illuminance immediately below the road surface 82, or the twice reflection component reflected by the other reflection surface of the reflected light of the facet 51E is not intended outside the target irradiation range. There is a risk of creating a spot-shaped irradiation part.

  Therefore, as shown in FIG. 3, the facet 51E is formed with a diffusion surface portion 56 that diffuses and reflects the light of the light emitting element module 31. The diffusion surface portion 56 is formed by arranging ribs having a triangular cross section in one direction (in this embodiment, the left-right direction). The diffusion surface portion 56 can alleviate the burden on the peak illuminance and the formation of spot-shaped irradiation portions outside the target irradiation range. Also in the simulation result, the peak illuminance is lowered and the lane axis uniformity is high as compared with the case where the diffusion surface portion 56 is not provided. Moreover, the spot-shaped irradiation part which the twice reflected component irradiated outside the target irradiation range becomes difficult to stand out.

Further, as shown in FIG. 3 and FIG. 7, convex-shaped reflecting surface portions 57 and 58 that distribute light traveling directly below in the left-right direction (longitudinal direction J) are formed on the upper side reflecting surface 51 and the lower side reflecting surface 52. Has been. The reflection surface portions 57 and 58 are provided so as to face each other at a position closest to the optical axis F of the light emitting element module 31.
The reflection surface portion 57 of the upper side reflection surface 51 is configured by connecting inclined surfaces 57A and 57B inclined from the upper side reflection surface 51 toward the left and right. Similarly, the reflection surface portion 58 of the lower side reflection surface 52 is configured by connecting inclined surfaces 58A and 58B inclined from the lower side reflection surface 52 to the left and right. The inclined surfaces 57A, 57B, 58A, 58B are formed so that their areas increase from the base 50B to the edge 50C.
6 and 9, the lengths L1 and L2 from the edge 50C of the reflecting surface portions 57 and 58, the heights H1 and H2 from the upper side reflecting surface 51 and the lower side reflecting surface 52, and the center of the light emitting portion 35 are referred to. The angles θ1 and θ2 from the center line N passing up and down C are set according to the desired light distribution.

In the present embodiment, the reflection surface portion 57 is provided from the base portion 50B to the edge portion 50C, and is formed in a substantially triangular cross section by connecting the inclined surfaces 57A and 57B.
The reflection surface portion 58 is provided on the lower side reflection surface 52 excluding the facet 52E on the base portion 50B side, and on the base portion 50B side, the inclined surfaces 58A and 58B are connected to each other so as to have a substantially trapezoidal cross section. Further, the reflection surface portion 58 is formed in a substantially trapezoidal cross section by connecting the inclined surfaces 58A and 58B with a flat surface 58C on the edge 50C side.
The left inclined surfaces 57A and 58A reflect the light traveling directly from the light emitting element module 31 and irradiate the far left side. The right inclined surfaces 56B and 57B reflect the light directed directly from the light emitting element module 31 and irradiate the far right side.

The convex reflecting surface portions 57 and 58 can distribute light directed in the downward direction to the horizontal direction (longitudinal direction J), so that the illuminance directly below can be suppressed and uneven illuminance on the road surface 82 (FIG. 2) can be suppressed. . Also in the simulation results, when the reflecting surface portions 57 and 58 are provided, the peak illuminance is lowered and the distribution is widened in the lane axis direction compared to the case where the reflecting surface portions 57 and 58 are not provided.
In particular, when a plurality of tunnel lighting devices 1 are used in the tunnel 80 (FIG. 2), when the illuminance directly below the tunnel lighting device 1 is high, stripes of bright and dark portions extending in the transverse direction M are formed on the road surface 82. The uniformity in the longitudinal direction J (lane axis uniformity) becomes worse. Therefore, by providing the convex reflection surface portions 57 and 58, when a plurality of tunnel lighting fixtures 1 are used in the tunnel 80, the lane axis uniformity can be improved. Therefore, since it is not necessary to aim partially in the instrument case 2 or use a plurality of types of optical systems, it is possible to reduce the types of components, thereby reducing manufacturing costs and improving assemblability.

  As shown in FIG. 9, the left side reflecting surface 53 and the right side reflecting surface 54 are formed so as to reflect light toward the inner wall 2 </ b> C of the instrument case 2 to the front side. The left side reflecting surface 53 and the right side reflecting surface 54 can prevent vignetting by the inner wall 2C of the instrument case 2 and improve the instrument efficiency. The left side reflecting surface 53 and the right side reflecting surface 54 are shaped so that the reflected light from the left side reflecting surface 53 and the right side reflecting surface 54 does not enter the upper side reflecting surface 51 and the lower side reflecting surface 52 as much as possible. Has been. Thereby, since reflection twice can be suppressed as much as possible, instrument efficiency can be improved and unintentional irradiation outside the target irradiation range can be reduced.

  In the present embodiment, as shown in FIG. 9, the left side reflection surface 53 and the right side reflection surface 54 are not formed in a planar shape but are formed in a generally arc shape. However, if the left-side reflecting surface 53 and the right-side reflecting surface 54 are simple curved surfaces, a light collecting portion is formed on the road surface 82 and uneven illuminance is caused. Therefore, a plurality of strip-shaped facets (plane) along the optical axis F direction. 53A and 54A are connected to each other. More specifically, the vicinity of the center where the light beam radiated from the center C of the light emitting unit 35 almost obliquely downward is reflected in a shape approximating a parabolic shape with the center C of the light emitting unit 35 as a focal point.

Here, since the light emitting unit 35 is planar, when a region other than the vicinity of the center is formed in a parabolic shape with the center of the light emitting unit as a focal point, approximately half of the component incident from another light emitting point is likely to be reflected twice. Will be reflected.
Therefore, in the areas other than the vicinity of the center, the angles of the facets 53A and 54A are set so that the light rays emitted from the upper and lower ends of the light emitting unit 35 are reflected in the longitudinal direction J. The shape is similar to the object shape. Thereby, since the striped illumination unevenness extending in the transverse direction M can be suppressed as much as possible, the lane axis uniformity can be improved. The left side reflection surface 53 and the right side reflection surface 54 are not symmetrical in the vertical direction because the angles and shapes of the upper side reflection surface 51 and the lower side reflection surface 52 are different.

  The bottom reflective surface 55 is a reflective surface that reflects the reflected light from the front glass 3 again, and a plurality of bosses 55A are formed on the bottom reflective surface 55 as shown in FIG. Thereby, the reflected light from the front glass 3 can be diffused, and as a result, it is possible to prevent an unintended spot-shaped irradiation part from being formed on the road surface 82. Further, the plurality of bosses 55A can make the scratches and the like generated in the manufacturing process inconspicuous. In addition, since the bottom reflective surface 55 connects the upper side reflective surface 51 and the lower side reflective surface 52, the rigidity of the reflector 32 can be improved.

As described above, according to the present embodiment, the light directed directly from the light emitting element module 31 to the pair of the upper side reflecting surface 51 and the lower side reflecting surface 52 facing each other with the light emitting element module 31 interposed therebetween in the left-right direction. Convex-shaped reflective surface portions 57 and 58 that are distributed toward each other are provided. With this configuration, the light traveling directly below can be distributed in the left-right direction, so that uneven illuminance can be suppressed.
Moreover, since the reflective surface portions 57 and 58 are provided in the vicinity of the optical axis F of the light emitting element module 31, uneven illuminance can be suppressed symmetrically in the vertical direction (transverse direction M).

  Moreover, according to this embodiment, it was set as the structure which made the shape extended from the light emitting element module 31 side of the upper side reflective surface 51 and the lower side reflective surface 52 to the irradiation side the shape approximated to a parabola. With this configuration, the light from the light emitting element module 31 can be irradiated as parallel light, so that the high intensity portion of the light distribution is shaped in the front direction of the tunnel lighting device 1 and along the longitudinal direction J of the road 81. be able to.

  In addition, according to the present embodiment, the upper side reflection surface 51 and the lower side reflection surface 52 connect a plurality of facets 51A-51E and 52A-52E that approximate a paraboloid from the light emitting element module 31 side to the irradiation side. It was set as the structure formed in a shape. With this configuration, the light collected by the paraboloid can be dispersed, so that the parabolic shape keeps the light collecting property strong, and the road surface 82 is likely to have uneven illuminance, but the upper side reflecting surface 51 and the lower side reflecting surface. By setting 52 to be a plurality of facets 51A-51E and 52A-52E, illuminance unevenness can be suppressed.

  In addition, according to the present embodiment, the left side reflective surface 53 and the right side reflective surface 54 that close the open portions on both sides of the pair of the upper side reflective surface 51 and the lower side reflective surface 52 are provided. The right-side reflection surface 54 is arranged to reflect the light from the light-emitting element module 31 toward the irradiation range. With this configuration, it is possible to suppress the striped illuminance unevenness extending in the transverse direction M as much as possible, so that the lane axis uniformity can be improved.

However, the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the reflective surface portion 57 is formed in a triangular shape in cross section and the reflective surface portion 58 is formed in a trapezoidal shape in cross section, but the shape of the reflective surface portions 57 and 58 is configured by a polygon, a curved surface, or a combination thereof. May be.

Moreover, in the above-mentioned embodiment, since the irradiation range and light distribution shape seen from the light emitting element module 31 are not symmetrical in the vertical direction (transverse direction M), the upper side reflection surface 51 and the lower side reflection surface 52 are different paraboloids. Is formed. However, when the irradiation range and light distribution shape viewed from the light emitting element module 31 are symmetrical in the vertical direction, the upper side reflection surface 51 and the lower side reflection surface 52 may be the same paraboloid.
In the above-described embodiment, the diffusion surface portion 56 is formed by arranging triangular cross-sectional ribs in one direction, but the shape of the diffusion surface portion 56 is not limited to this. For example, the diffusion surface portion 56 may be formed by arranging ribs having a semicircular cross section, or may be formed with slits instead of the ribs.

In the above-described embodiment, the upper side reflection surface 51, the lower side reflection surface 52, the left side reflection surface 53, the right side reflection surface 54, the bottom surface reflection surface 55, and the reflection surface portions 57 and 58 are integrally formed. These may be formed separately and assembled together.
In the above-described embodiment, the left side reflection surface 53, the right side reflection surface 54, and the bottom surface reflection surface 55 are provided, but these may be omitted. Furthermore, in the above-described embodiment, the boss 55A is provided on the bottom reflective surface 55, but the boss 55A may be omitted.

  Further, in the above-described embodiment, the edge portion 50C side of the upper side reflection surface 51 and the lower side reflection surface 52 has a shape that approximates a parabola, but the upper side reflection surface 51 and / or the lower side reflection surface 52 is The edge 50C side (for example, facets 51A and 51B) may be provided so as to be inclined inward from the basic parabolic shape. Thereby, the height of the up-down direction of the reflector 32 can be made small, and the reflector 32 can be reduced in size.

In the above-described embodiment, the reflection surface portions 57 and 58 are provided on both the upper side reflection surface 51 and the lower side reflection surface 52 so as to face the optical axis F of the light emitting element module 31 in the vicinity. It is not limited. For example, as shown in FIGS. 10A and 10B, a reflective surface portion 57 or a reflective surface portion 58 may be provided on one of the upper side reflective surface 51 or the lower side reflective surface 52.
Further, as shown in FIG. 10C, one reflector 32 may be disposed for the plurality of light emitting element modules 31, and the reflective surface portions 57 and 58 may be provided in each of the light emitting element modules 31. In this case, as shown in FIG. 10D, a left side reflection surface 53 and a right side reflection surface 54 may be integrally formed between the light emitting element modules 31. As shown in FIG. 10E, a combination of these modifications may be employed.
Furthermore, as shown in FIG. 10 (F), the reflection surface portions 57 and 58 may be provided alternately without making the reflection surface portions 57 and 58 face each other between the upper side reflection surface 51 and the lower side reflection surface 52. In FIG. 10, parts having the same action are denoted by the same reference numerals and description thereof is omitted.

Moreover, although LED was illustrated as an example of a light emitting element in the above-mentioned embodiment, not only this but arbitrary elements can be used. Further, the light emitting element module is not limited to a planar one.
Moreover, in the above-described embodiment, the tunnel lighting fixture can suppress uneven illuminance even when a high-power light-emitting element module is used, and thus was optimal for tunnel entrance lighting that requires high-intensity illumination. The application of the tunnel lighting fixture is not limited to this.
Further, for example, the tunnel lighting fixture is exemplified as an example of a road lighting fixture, but the present invention is not limited thereto, and various road lighting fixtures such as a lighting fixture that is installed on a sound insulation wall of an expressway and illuminates a road surface are used. It can be applied to. In addition, the present invention is not limited to a road lighting device, and can be applied to any lighting device.

1 Tunnel lighting equipment (lighting equipment)
34 Substrate 35 Light emitting unit 31 Light emitting element module 50 Reflecting surface 50A Opening portion 51 Upper side reflecting surface (facing reflecting surface)
52 Lower side reflective surface (face-to-face reflective surface)
53 Left side reflective surface (auxiliary reflective surface)
54 Right side reflective surface (auxiliary reflective surface)
55 Bottom reflecting surface 56 Diffusing surface portion 57, 58 Reflecting surface portion 51A-51E Facet (plane)
52A-52E Facet (plane)
53A-53E Facet (plane)
54A-54E Facet (plane)
51E, 52E Facet (wide expansion)
F Optical axis

Claims (9)

A light emitting element module in which a plurality of light emitting elements are arranged on a substrate to form a light emitting portion;
A pair of facing reflecting surfaces facing each other with the light emitting element module sandwiched therebetween,
With
A lighting fixture comprising: a convex reflection surface portion that distributes light directed directly from the light emitting element module toward open portions on both sides of the pair of the facing reflection surfaces on at least one of the facing reflection surfaces.   The lighting fixture according to claim 1, wherein a shape of the facing reflection surface extending from the light emitting element module side to the irradiation side is approximated to a parabolic shape.   The lighting apparatus according to claim 2, wherein the facing reflection surface is formed in a shape in which a plurality of planes approximate to the parabolic shape are connected from the light emitting element module side to the irradiation side.   The lighting fixture according to any one of claims 1 to 3, wherein the reflective surface portion is provided on a pair of the reflective surfaces facing each other in the vicinity of an optical axis of the light emitting element module.   An auxiliary reflecting surface that closes open portions on both sides of the pair of facing reflecting surfaces is provided, and the auxiliary reflecting surfaces are arranged so as to reflect light of the light emitting element module toward an irradiation range. Item 5. A lighting fixture according to any one of Items 1 to 4.   The lighting apparatus according to claim 5, wherein the auxiliary reflecting surface has a shape in which a plurality of planes are connected from one facing reflecting surface to the other facing reflecting surface.   The said facing reflective surface has a widening part which spreads on the said light emitting element module side from the said paraboloid to the outer side of the light emission part of the said light emitting element module, The Claim 1 thru | or 6 characterized by the above-mentioned. lighting equipment.   The lighting device according to claim 7, wherein a diffusion surface portion that diffuses and reflects light of the light emitting element module is provided in the widened portion.   The lighting fixture according to any one of claims 1 to 8, further comprising a bottom surface reflecting surface that couples the pair of the facing reflecting surfaces to the light emitting element module side.

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